You can make fossils from common items around your home

Students and Beginners

Let's Go Rocking!
Rock Crafts for Fun
Crystal Growing
Make Your Own Fossils
Build an Erupting Volcano
Cub Scout Achievements
BSA Geology Merit Badge
Girl Scout Juniors
Girl Scout Seniors

AR Rock Clubs and Shows


What Geologists Do

Careers in Geology

Places To Go

Crater of Diamonds
Tourist Sites to See
Fee Pay Crystal Mines
Locations by County
Field Trips
Lake Ouachita Geofloat
Buffalo River

Famous and Historical Mineral Locations

Magnet Cove
Granite Mountain
Jeffrey Quarry


Make Your Own Fossils

What you will need:drawing of kid

    • A small shallow cardboard or plastic box (like a cut-off milk jug)
    • soft modeling clay or sculpting clay
    • plaster of paris
    • water and a small bucket to mix the plaster in
    • a knife or popcicle stick
    • cooking oil, shortening, or petroleum jelly
    • sea shells, leaves, chicken bones, a baby tooth... items to make your "fossil" from

How to make your fossil

1. Start off by making a smooth layer of clay in the bottom of your box. This clay represents the mud that the once-living organism fell on to.

2. Press in your shell or leaf, or anything once living, into the clay. You can also make a handprint or footprint, or pawprint if your pet will let you.

3. Mix the plaster of paris according to the package directions. Pour the thick soupy plaster over your clay in a thin layer, and let it harden. Be sure *not* to pour any leftover plaster down your sink, because it will stop up the drain!

4. Carefully remove the clay and hard plaster from the box. Scrape the clay off of the plaster, and you'll find a backwards impression of your fossil. This negative shape is like a mold fossil, where a dead animal or plant rotted away and left its shape in the mud, which later turned to rock.

5. To make a cast fossil (or a positive shape) from what you have done, coat the negative plaster piece with oil or shortening. Put this piece back in the box, fossil side up. Mix up some more plaster and pour a second layer over the first.

6. After the plaster hardens, remove it all from the box and separate the two pieces. Now you have a shape like the original living organism. If you would like to make it more realistic, you can paint your fossils to look like real ones.

See also The Stories Fossils Tell


Send us some photos of your fossils!